245525580 has 120 divisors (see below), whose sum is σ = 795231360. Its totient is φ = 63348480.

The previous prime is 245525573. The next prime is 245525639. The reversal of 245525580 is 85525542.

245525580 = 2458² + 2459² + ... + 2497².

It is a happy number.

245525580 is a `hidden beast` number, since 2 + 4 + 55 + 25 + 580 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47776 + ... + 52664.

It is an arithmetic number, because the mean of its divisors is an integer number (6626928).

Almost surely, 2^245525580 is an apocalyptic number.

245525580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245525580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397615680).

245525580 is an abundant number, since it is smaller than the sum of its proper divisors (549705780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245525580 is a wasteful number, since it uses less digits than its factorization.

245525580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941 (or 4930 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 245525580 is about 15669.2558853316. The cubic root of 245525580 is about 626.1796005342.

It can be divided in two parts, 245 and 525580, that added together give a triangular number (525825 = T₁₀₂₅).

The spelling of 245525580 in words is "two hundred forty-five million, five hundred twenty-five thousand, five hundred eighty".